<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
     .huojian {
            position: absolute;
            top: 300px;
            left: 800px;
            animation: zd 0.4s linear 0s infinite alternate;
            /* animation: zd .4s linear 0s infinite normal; */
        }

        @keyframes zd {
            from {
                transform: translateX(-20px) translateY(-20px);
            }
            to {
                transform: translateX(20px) translateY(20px);
            }
        }

        .line1 {
            width: 2px;
            height: 166px;
            background-color: blue;
            position: absolute;
            top: 300px;
            left: 800px;
            transform: rotate(45deg);
            animation: yd 3s linear 0s infinite;
            opacity: 0;
        }
        .line2 {
            width: 2px;
            height: 266px;
            background-color: blue;
            position: absolute;
            top: 340px;
            left: 850px;
            transform: rotate(45deg);
            animation: yd 1s linear .4s infinite;
            opacity: 0;
        }
        .line3 {
            width: 2px;
            height: 266px;
            background-color: rgb(29, 216, 169);
            position: absolute;
            top: 390px;
            left: 890px;
            transform: rotate(45deg);
            animation: yd 1s linear .68s infinite;
            opacity: 0;
        }
        .line4 {
            width: 2px;
            height: 266px;
            background-color: rgb(165, 99, 23);
            position: absolute;
            top: 390px;
            left: 920px;
            transform: rotate(45deg);
            animation: yd 1s linear .2s infinite;
            opacity: 0;
        }
        @keyframes yd {
            0% {
                transform: rotate(45deg) translateY(-300px);
                opacity: 0;
            }
            50% {
                opacity: 1;
            }
            100% {
                transform: rotate(45deg) translateY(300px);
                opacity: 0;
            }
        }
    </style>
</head>
<body>


    <img class="huojian" src="images/huojian.png" alt="">
    <div class="line1"></div>
    <div class="line2"></div>
    <div class="line3"></div>
    <div class="line4"></div>
</body>
</html>